M odern smart watches can measure an array of health indicators. Step counts and heart rates sit at the simpler end, while VO2 max and blood-oxygen levels are mainly of interest to committed health ...

If you wear a fitness tracker, you've likely seen a stat labeled "HRV" pop up on your screen. But what does it mean, and does it matter? Short for heart rate variability, HRV has become a popular ...

Objective Identify key determinants of heart rate variability (HRV) in male athletes aged 14–21 years participating in competitive contact sports and integrate these determinants to define normative ...

These days, it may seem like there’s a million different data points that you’re supposed to keep track of—hello, steps, sleep, and recovery scores!—and it’s difficult to know which ones are worth ...

Add Yahoo as a preferred source to see more of our stories on Google. If you wear a fitness tracker, you’ve likely seen a stat labeled “HRV” pop up on your screen. But what does it mean, and does it ...